APP_KEY can be as simple as running
php artisan key:generate, but what about your encrypted model data?
This is where laravel app key rotator comes in. This package can help with generating a new app key for you, as well
as decrypting and re-encrypting your model automatically for you through an artisan command.
It's also generally a good practice to rotate your app keys periodically (e.g. every 6 months) or when certain events happen, such as an employee leaving the company. See more information here: https://tighten.co/blog/app-key-and-you/
Rotating your app keys is as simple as running this artisan command:
php artisan app-key-rotator:rotate